221457660013265 has 64 divisors (see below), whose sum is σ = 289079637073920. Its totient is φ = 161894564075520.

The previous prime is 221457660013223. The next prime is 221457660013279. The reversal of 221457660013265 is 562310066754122.

It is not a de Polignac number, because 221457660013265 - 2¹² = 221457660009169 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19561663805 + ... + 19561675125.

It is an arithmetic number, because the mean of its divisors is an integer number (4516869329280).

Almost surely, 2^{221457660013265} is an apocalyptic number.

It is an amenable number.

221457660013265 is a deficient number, since it is larger than the sum of its proper divisors (67621977060655).

221457660013265 is a wasteful number, since it uses less digits than its factorization.

221457660013265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17514.

The product of its (nonzero) digits is 3628800, while the sum is 50.

The spelling of 221457660013265 in words is "two hundred twenty-one trillion, four hundred fifty-seven billion, six hundred sixty million, thirteen thousand, two hundred sixty-five".